EP2071972B1 - A fluid-tight slide fastener - Google Patents
A fluid-tight slide fastener Download PDFInfo
- Publication number
- EP2071972B1 EP2071972B1 EP07024770A EP07024770A EP2071972B1 EP 2071972 B1 EP2071972 B1 EP 2071972B1 EP 07024770 A EP07024770 A EP 07024770A EP 07024770 A EP07024770 A EP 07024770A EP 2071972 B1 EP2071972 B1 EP 2071972B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fluid
- slide fastener
- teeth
- tape
- tapes
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Not-in-force
Links
- 239000010410 layer Substances 0.000 claims description 36
- 239000004753 textile Substances 0.000 claims description 29
- 239000000463 material Substances 0.000 claims description 24
- 238000000034 method Methods 0.000 claims description 14
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- 239000011248 coating agent Substances 0.000 claims description 12
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- 238000003475 lamination Methods 0.000 claims description 5
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- 230000032798 delamination Effects 0.000 description 5
- 238000001746 injection moulding Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 229920002725 thermoplastic elastomer Polymers 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000001965 increasing effect Effects 0.000 description 3
- 229920000515 polycarbonate Polymers 0.000 description 3
- 239000004417 polycarbonate Substances 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 229920001400 block copolymer Polymers 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
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- 229920001577 copolymer Polymers 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
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- 239000013067 intermediate product Substances 0.000 description 1
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- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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Images
Classifications
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B19/00—Slide fasteners
- A44B19/24—Details
- A44B19/32—Means for making slide fasteners gas or watertight
-
- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B19/00—Slide fasteners
- A44B19/24—Details
- A44B19/40—Connection of separate, or one-piece, interlocking members to stringer tapes; Reinforcing such connections, e.g. by stitching
- A44B19/403—Connection of separate interlocking members
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2600/00—Uses of garments specially adapted for specific purposes
- A41D2600/10—Uses of garments specially adapted for specific purposes for sport activities
Definitions
- the present invention refers to a fluid-tight slide fastener and to a process for manufacturing a fluid-tight slide fastener.
- a slide fastener in essential terms, comprises a pair of tapes bearing respective rows of teeth, top and bottom stops, and a slider for opening and closing the fastener by engaging and disengaging the teeth.
- Fluid-tight slide fasteners are needed for a number of applications, such as provision of sports and outdoor activity items, diving or sailing suits, camping tents and the like. Said fasteners are required to be resistant to passage of a liquid and/or gas, e.g. water and/or air even under a significant pressure difference between the interior and the exterior, for example up to about 2 bars; at the same time, they must be tenacious and pliable.
- a liquid and/or gas e.g. water and/or air even under a significant pressure difference between the interior and the exterior, for example up to about 2 bars; at the same time, they must be tenacious and pliable.
- fluid-tight slide fasteners are realized with layered tapes made of a textile core layer coated with a suitable fluid-barrier layer, and teeth which are applied to the layered tapes or injection-molded.
- materials it is known to realize fluid-tight slide fasteners with textile tapes coated with a thermoplastic elastomer material (TPE) and teeth made of a thermoplastic material.
- TPE thermoplastic elastomer material
- US 2006/101632 discloses a pattern imprinted on a finished zipper by means of a patterning roller.
- EP 0 108 214 discloses stringer tapes with a thickened or enlarged resilient sealing member extending along the edge portion.
- US 4 123 830 discloses stringer tapes with a reinforcing cord along one edge.
- WO 02/03825 discloses a slide fastener with teeth welded onto the tapes.
- the region of the slide fastener wherein teeth are fixed to the coated tapes is known to be a critical point of a fluid-tight slide fastener.
- the coupling between each tooth and the tapes in fact, must be fluid-tight and must also withstand the mechanical stress due to opening and closing action of the slider, bending of the tapes, handling and direct exposure to environment.
- the layered tapes may suffer a separation of the layers due to intensive use and/or lack of adhesion between the layers. Due to said separation, also known as delamination, the textile core may be exposed and in such a case the fluid-tight performance is generally compromised.
- the technical problem underlying the invention is to improve the fluid-tight performance and reliability of a fluid-tight slide fastener as defined above, with particular regard to the coupling between the teeth and the coated tapes.
- a fluid-tight slide fastener comprising a pair of tapes, each of said tape comprising a textile core layer and a fluid barrier layer coating said textile layer, and having at least a portion carrying a row of teeth along an inner edge, characterized in that each of said tapes comprises a knurled region on at least one side of the tape and on the exterior side of the fluid barrier layer, said knurled region being extended along said inner edge of tape and at least on said portion of the tape carrying said row of teeth, such that the teeth are fixed to the knurled region of the tape.
- Said knurled (or embossed) region is formed as a continuous longitudinal stripe parallel to said inner edge.
- said knurled region has a width which is greater than width of root portions of said teeth.
- the coupling region between the teeth and the tape is fully comprised in said knurled region of tape.
- the width of the knurled region of tape is about 1.5 - 2 times the width of root portions of teeth.
- said knurled region is provided on one side of the tapes, preferably the front side facing the exterior, or the same knurled region is provided on both front and rear sides of tapes.
- the knurled region can be obtained directly during the manufacturing of the coated tapes, for example directly after the coating of the textile core layer with the fluid-barrier layer.
- the knurled region may be obtained with a subsequent process step operated on a semi-finished product such as a strip of textile material coated with said fluid-barrier layer.
- tapes of the slide fastener are manufactured by extrusion or lamination of a selected fluid-barrier material, preferably in a melted state, onto strips of textile material.
- a knurling process step is performed on the coated strips, obtaining said knurled region on one or both sides of the tapes. Teeth are then fixed and made integral to said knurled region of the tapes, for example by injection molding.
- a process according to the invention for making a tape for a slide fastener comprises at least the steps of:
- the textile material of the core layer of tapes is chosen preferably among polyester (PE), preferably polyethylene terephtalate (PET), polyamide (PA) and their blends or copolymers.
- PET polyethylene terephtalate
- PA polyamide
- the textile material is a spun yarn of cut fibers, having an irregular surface similar to a natural fiber which tends to remain embedded in the fluid-barrier layer, enhancing the resistance to delamination.
- the fluid-barrier material is preferably provided on the textile core layer in a melted state, for example extruded or laminated.
- the process as disclosed above preferably provides use of a textile strip of a spun yarn of cut fibers, said fibers being obtained with a cutting process of continuous fibers.
- the strip of textile material is coated by extrusion or lamination of melted fluid-barrier material so that surface irregularities of the spun yarn remain embedded in the fluid-barrier layer.
- the fluid-barrier layer is preferably made of a thermoplastic elastomer polyurethane (TPE-U) or a thermoplastic elastomer polyester (TPE-E).
- TPE-U thermoplastic elastomer polyurethane
- TPE-E thermoplastic elastomer polyester
- said TPE-E is a polyether-ester block copolymer
- said TPE-U is a block copolymer obtained from an ether and/or an ester and a isocyanate.
- Teeth of the slide fastener are made, according to some embodiments, of a thermoplastic material consisting of a blend including PBT and polycarbonate (PC).
- the PBT/PC weight ratio in said blend ranges between 70/30 and 30/70.
- the teeth are made of a blend including ABS and a polyamide (PA). More preferably, the ABS/PA weight ratio in said blend ranges between 70/30 and 30/70.
- a fluid barrier layer of TPE-E is chosen in combination with teeth made of PBT.
- a fluid barrier layer of TPE-U is chosen in combination with teeth made of either a blend of ABS and PA or a blend of PBT and PC.
- the fluid barrier layer and the teeth may include suitable additives such as, for instance fillers, pigments, binders and/or compatibilizers, the latter being incorporated to improve the physical and chemical affinity between said materials and/or between the materials used for the layered structure of the tape.
- suitable additives such as, for instance fillers, pigments, binders and/or compatibilizers, the latter being incorporated to improve the physical and chemical affinity between said materials and/or between the materials used for the layered structure of the tape.
- the tapes of the slide fastener may also comprise a further, optional adhesive layer between the textile core and layer and the fluid-barrier coating.
- the adhesive is selected to have a strong chemical affinity for both the materials to be joined.
- the adhesive comprises a polyurethane resin.
- sports and outdoor activity items such as a diving suit, a sailing suit, a camping tent and the like, are made comprising a fluid-tight slide fastener as described above.
- the knurled region has a non-smooth surface, with crests alternated to embossed regions according to a direction perpendicular to the surface of the tapes, thus increasing the whole contact surface available to the coupling between the tapes and the teeth. Hence, a stronger bond between each tooth and the tape is obtained.
- the knurled region has a retaining effect on the teeth, opposing to their movement and/or rotation respective to the tape, and thus increasing the mechanical resistance to bending.
- the fluid-tight performance is also improved by the fact that the knurled region is a further obstacle to the passage of fluids like air and water at the tooth-tape interface. It may be stated that said crests and embossed areas on the surface of the tape act like a labyrinth against the passage of fluids, especially water.
- the preferred materials give a further advantage in terms of mechanical properties at both interfaces between the layers of the tapes and between the fluid barrier layer and teeth, due to a chemical bonding effect.
- the use of a spun yarn for the textile core layer of the tapes has a further advantage.
- the spun yars has fibers protruding from the ideal diameter of the yarn itself, which remain embedded in the material of the fluid-barrier layer, giving a further mechanical bond between the layers and enhancing the resistance to delamination.
- the knurled or embossed region defines a useful reference line for assembling the tapes of the slide fastener on a garment on suit.
- the external borderline of the knurled region indicates a limit not to overcome when assembling (e.g. sewing) the slide fastener on the garment.
- a fluid-tight slide fastener 1 in accordance with an embodiment of the present invention, comprises a pair of tapes 2, equipped with teeth 3, a bottom stop 4, top stops 5, and a slider 6.
- Tapes 2 have a layered structure made of a textile core layer fully coated on both sides by a suitable fluid-barrier layer.
- Each of tapes 2 is carrying a row of teeth 3.
- Teeth 3 are associated with a portion of the tapes 2, between bottom stop 4 and top stops 5, along inner edges 7 of said tapes 2.
- Teeth 3 are associated to tapes 2 in a fluid-tight manner, for example through injection molding.
- Top and bottom stops 4, 5 are also fixed to the tapes 2 in a fluid-tight manner, for example through injection molding.
- the figures relates, in a non-limiting way, to an embodiment wherein the bottom stop 4 is made in a single piece applied on both tapes at one end of the teeth rows, whereas two top stops 5 are applied the respective tapes 2 at the opposite end of the teeth rows.
- the top stop can be made in a single piece, or the bottom stop can be made in two half-pieces.
- Each tape 2 comprises a knurled surface region 10, formed as a longitudinal stripe extending from said inner edge 7 and having a predetermined width, so that teeth 3 are associated with said knurled region 10 of the tape 2.
- Knurled region 10 is provided along the entire tape 2 or, at least, on the portion of tape 2 carrying the row of teeth 3.
- Figs. 2 and 3 show more detail of the embodiment herein discussed.
- Tapes 2 comprise a textile core 20 fully enveloped by a fluid-barrier coating 21.
- Teeth 3 have a root portion 30, coupled to the respective tape 2, and a head portions 31 projecting from inner edge 7 for reciprocal engagement under the action of slider 6. It may be noted that edges 7 are formed by the coating 21 envelopping the textile core 20.
- the knurled region 10 has a non-smooth surface with a pattern of crests 11 projecting away from embossed surface areas 12, obtained as a permanent deformation of the fluid-barrier coating 21 of tapes 2.
- the crests 11 are arranged according to the pattern of Fig. 2 , i.e. straight lines crossing at 90° and inclined by 45° with respect to the rows of teeth 3.
- the width W of knurled region 10 is preferably about 1.5 - 2 times the width of root portions 30 of teeth 3 ( Fig. 2 ).
- a knurled region 10 is provided on both sides of tapes 2, namely on front surface 22, intended to face the exterior, and on the opposite rear surface 23.
- front surface 22 is the outer surface exposed to environmental agents
- rear surface 23 is the inner surface.
- a knurled region 10 can be provided only on one side of the tapes 2, namely on one of said surfaces 22, 23, preferably on the front surface 22.
- Fig. 6 allows a better appreciation of crests 11 projecting away from areas 12 engraved on the fluid-barrier coating 21 of tapes 2.
- Fig. 6 also shows a passing hole 13 which is used for molding the teeth 3.
- Fig. 6 also provides better appreciation of the fact that crests 11 increase the available surface for coupling with the teeth 3, compared to a perfectly smooth tape.
- the surface on the plane perpendicular to axis of the hole 13, which would be the only available surface on a smooth tape is increased by the side surfaces of said crests projecting away from areas 12. A gain in available surface of 10% or more can be achieved.
- Figs. 7 and 8 show a portion of a tape 2 during the manufacturing process.
- a strip 40 is formed by coating a textile, inner core layer with a fluid-barrier layer, enveloping said inner core layer on both sides.
- Said strip 40 has an edge 7, also covered by said fluid-barrier layer, where teeth are associated to the strip.
- a knurled, longitudinal region 10, in the form of a stripe having a width W, is formed from said edge 7, by a knurling or embossing process of the strip 40.
- Said process defines on surface of the region 10 a pattern of crests 11 projecting away from embossed areas 12, wherein the fluid-barrier layer is made thinner.
- Teeth 3 are then associated to the strip 40, for example by injection molding, along said edge 7 ( Fig. 8 ). Teeth 3 are made integral with the knurled, longitudinal region 10 of the strip 40. Strip 40 is then cut transversally to obtain tapes 2 of a desired length, and said tapes 2 are equipped with stops and a slider, such as stops 4, 5 and slider 6, to obtain a fastener zip as seen, for example, in Fig. 1 .
- a process for obtaining the strip 40 is schematized.
- a textile, continuous strip 50 is passed through a suitable extruder 51, fed with a fluid-barrier material M in a melted state, obtaining as intermediate product a coated strip 52, wherein the textile strip is enveloped by the fluid-barrier material.
- the coated strip is passed through a couple of rolls 53 and 54, deforming both front and rear surfaces of the coated strip near an edge thereof, obtaining the strip 40 with knurled region 10.
- the rolls 53, 54 are immediately downstream the extruder 51, so that the coating is still hot and easily deformed.
- the coated tapes 2 can also be made by lamination.
- the strip 50 can be made of a spun yarn and coated by extrusion or lamination of melted fluid-barrier material, so that the surface irregularities of the spun yarn remain embedded in the solidified fluid-barrier layer and provides a "grasping" effect of the textile layer on the fluid-barrier layer, i.e. a stronger coupling between the layers.
- the fluid-tight slide fastener according to the present invention solves the technical problem, mostly by the fact that it exhibits good long-term fluid-tight characteristics and resistance to delamination, bending and other mechanical stress especially at tooth-tape interface.
Landscapes
- Slide Fasteners (AREA)
- Lubricants (AREA)
- Holders For Sensitive Materials And Originals (AREA)
- Tents Or Canopies (AREA)
- Pens And Brushes (AREA)
Abstract
Description
- The present invention refers to a fluid-tight slide fastener and to a process for manufacturing a fluid-tight slide fastener.
- A slide fastener, in essential terms, comprises a pair of tapes bearing respective rows of teeth, top and bottom stops, and a slider for opening and closing the fastener by engaging and disengaging the teeth.
- Fluid-tight slide fasteners are needed for a number of applications, such as provision of sports and outdoor activity items, diving or sailing suits, camping tents and the like. Said fasteners are required to be resistant to passage of a liquid and/or gas, e.g. water and/or air even under a significant pressure difference between the interior and the exterior, for example up to about 2 bars; at the same time, they must be tenacious and pliable.
- According to known art, fluid-tight slide fasteners are realized with layered tapes made of a textile core layer coated with a suitable fluid-barrier layer, and teeth which are applied to the layered tapes or injection-molded. With regard to materials, it is known to realize fluid-tight slide fasteners with textile tapes coated with a thermoplastic elastomer material (TPE) and teeth made of a thermoplastic material.
-
US 2006/101632 discloses a pattern imprinted on a finished zipper by means of a patterning roller.EP 0 108 214 discloses stringer tapes with a thickened or enlarged resilient sealing member extending along the edge portion.US 4 123 830 discloses stringer tapes with a reinforcing cord along one edge.WO 02/03825 - The region of the slide fastener wherein teeth are fixed to the coated tapes is known to be a critical point of a fluid-tight slide fastener. The coupling between each tooth and the tapes, in fact, must be fluid-tight and must also withstand the mechanical stress due to opening and closing action of the slider, bending of the tapes, handling and direct exposure to environment.
- Furthermore, the layered tapes may suffer a separation of the layers due to intensive use and/or lack of adhesion between the layers. Due to said separation, also known as delamination, the textile core may be exposed and in such a case the fluid-tight performance is generally compromised.
- The technical problem underlying the invention is to improve the fluid-tight performance and reliability of a fluid-tight slide fastener as defined above, with particular regard to the coupling between the teeth and the coated tapes.
- This problem is solved by providing a knurled or embossed region on at least one side of the tapes of the slide fastener. More in detail, the problem is solved by a fluid-tight slide fastener comprising a pair of tapes, each of said tape comprising a textile core layer and a fluid barrier layer coating said textile layer, and having at least a portion carrying a row of teeth along an inner edge, characterized in that each of said tapes comprises a knurled region on at least one side of the tape and on the exterior side of the fluid barrier layer, said knurled region being extended along said inner edge of tape and at least on said portion of the tape carrying said row of teeth, such that the teeth are fixed to the knurled region of the tape. Said knurled (or embossed) region is formed as a continuous longitudinal stripe parallel to said inner edge.
- According to a preferred aspect of the invention, said knurled region has a width which is greater than width of root portions of said teeth. As the root portions of the teeth are portions which are fixed with to the tape, the coupling region between the teeth and the tape is fully comprised in said knurled region of tape. In a preferred embodiment, the width of the knurled region of tape is about 1.5 - 2 times the width of root portions of teeth.
- According to embodiments of invention, said knurled region is provided on one side of the tapes, preferably the front side facing the exterior, or the same knurled region is provided on both front and rear sides of tapes.
- The knurled region can be obtained directly during the manufacturing of the coated tapes, for example directly after the coating of the textile core layer with the fluid-barrier layer. In an equivalent manner, the knurled region may be obtained with a subsequent process step operated on a semi-finished product such as a strip of textile material coated with said fluid-barrier layer.
- According to a preferred embodiment, tapes of the slide fastener are manufactured by extrusion or lamination of a selected fluid-barrier material, preferably in a melted state, onto strips of textile material. A knurling process step is performed on the coated strips, obtaining said knurled region on one or both sides of the tapes. Teeth are then fixed and made integral to said knurled region of the tapes, for example by injection molding.
- A process according to the invention for making a tape for a slide fastener comprises at least the steps of:
- coating a textile strip with a fluid-barrier material;
- subjecting the coated strip to a knurling process, to obtain a knurled region on at least one side of said strip and on the exterior side of the fluid barrier layer and near an edge thereof;
- fixing a row of teeth to said knurled region of the strip;
- cutting the strip to obtain a tape of a given length.
- The textile material of the core layer of tapes is chosen preferably among polyester (PE), preferably polyethylene terephtalate (PET), polyamide (PA) and their blends or copolymers.
- According to another aspect of the invention, the textile material is a spun yarn of cut fibers, having an irregular surface similar to a natural fiber which tends to remain embedded in the fluid-barrier layer, enhancing the resistance to delamination. The fluid-barrier material is preferably provided on the textile core layer in a melted state, for example extruded or laminated.
- Hence, the process as disclosed above preferably provides use of a textile strip of a spun yarn of cut fibers, said fibers being obtained with a cutting process of continuous fibers. More preferably, the strip of textile material is coated by extrusion or lamination of melted fluid-barrier material so that surface irregularities of the spun yarn remain embedded in the fluid-barrier layer.
- The fluid-barrier layer is preferably made of a thermoplastic elastomer polyurethane (TPE-U) or a thermoplastic elastomer polyester (TPE-E). For example, said TPE-E is a polyether-ester block copolymer and said TPE-U is a block copolymer obtained from an ether and/or an ester and a isocyanate.
- Teeth of the slide fastener are made, according to some embodiments, of a thermoplastic material consisting of a blend including PBT and polycarbonate (PC). Preferably, the PBT/PC weight ratio in said blend ranges between 70/30 and 30/70. According to other embodiments, the teeth are made of a blend including ABS and a polyamide (PA). More preferably, the ABS/PA weight ratio in said blend ranges between 70/30 and 30/70.
- According to a more preferred embodiment, a fluid barrier layer of TPE-E is chosen in combination with teeth made of PBT. According to another embodiment, a fluid barrier layer of TPE-U is chosen in combination with teeth made of either a blend of ABS and PA or a blend of PBT and PC.
- The fluid barrier layer and the teeth may include suitable additives such as, for instance fillers, pigments, binders and/or compatibilizers, the latter being incorporated to improve the physical and chemical affinity between said materials and/or between the materials used for the layered structure of the tape.
- The tapes of the slide fastener may also comprise a further, optional adhesive layer between the textile core and layer and the fluid-barrier coating. Advantageously, the adhesive is selected to have a strong chemical affinity for both the materials to be joined. Preferably, the adhesive comprises a polyurethane resin.
- According to the invention, sports and outdoor activity items, such as a diving suit, a sailing suit, a camping tent and the like, are made comprising a fluid-tight slide fastener as described above.
- Advantages of the invention are the following. The knurled region has a non-smooth surface, with crests alternated to embossed regions according to a direction perpendicular to the surface of the tapes, thus increasing the whole contact surface available to the coupling between the tapes and the teeth. Hence, a stronger bond between each tooth and the tape is obtained.
- Moreover, is has been found that the knurled region has a retaining effect on the teeth, opposing to their movement and/or rotation respective to the tape, and thus increasing the mechanical resistance to bending.
- The fluid-tight performance is also improved by the fact that the knurled region is a further obstacle to the passage of fluids like air and water at the tooth-tape interface. It may be stated that said crests and embossed areas on the surface of the tape act like a labyrinth against the passage of fluids, especially water.
- In practical terms, it has been found that a fluid-tight fastener with knurled tapes as above defined has better fluid-tight performance and resistance to mechanical wear compared to known fasteners. It has also been found that the invention reduces the percentage of defective pieces, compensating for some imperfect adhesion between tapes and certain teeth, which otherwise would have lead to a loss of fluid-tightness.
- The preferred materials, as listed above, give a further advantage in terms of mechanical properties at both interfaces between the layers of the tapes and between the fluid barrier layer and teeth, due to a chemical bonding effect.
- The use of a spun yarn for the textile core layer of the tapes has a further advantage. The spun yars has fibers protruding from the ideal diameter of the yarn itself, which remain embedded in the material of the fluid-barrier layer, giving a further mechanical bond between the layers and enhancing the resistance to delamination.
- Another advantage is that the knurled or embossed region defines a useful reference line for assembling the tapes of the slide fastener on a garment on suit. In fact, the external borderline of the knurled region indicates a limit not to overcome when assembling (e.g. sewing) the slide fastener on the garment.
- Further advantages and characteristics of the slide fasteners according to the inventions will be more evident from the detailed description and examples provided here below, given as indicative and not limiting purpose.
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Fig. 1 is a perspective view of a fluid-tight slide fastener according to an embodiment of the present invention. -
Fig. 2 is a top view of a portion of a tape of the slide fastener ofFig. 1 . -
Fig. 3 is a section according to line III-III ofFig. 2 . -
Fig. 4 is a top view of a portion of a tape of the slide fastener ofFig. 1 . -
Fig. 5 is a section according to line V-V ofFig. 4 . -
Fig. 6 is a perspective, enlarged view of a portion of tapes ofFig. 1 , in the region where a tooth is coupled to the tape. -
Fig. 7 and 8 are a view of a portion of the tapes of the fastener inFig. 1 , during their manufacturing process. -
Fig. 9 is a simplified scheme of a process for realizing tapes for a slide fastener according to the invention. - With reference to
figures 1 , a fluid-tight slide fastener 1, in accordance with an embodiment of the present invention, comprises a pair oftapes 2, equipped withteeth 3, a bottom stop 4, top stops 5, and aslider 6. -
Tapes 2 have a layered structure made of a textile core layer fully coated on both sides by a suitable fluid-barrier layer. - Each of
tapes 2 is carrying a row ofteeth 3.Teeth 3 are associated with a portion of thetapes 2, between bottom stop 4 andtop stops 5, alonginner edges 7 of saidtapes 2.Teeth 3 are associated totapes 2 in a fluid-tight manner, for example through injection molding. - Top and bottom stops 4, 5 are also fixed to the
tapes 2 in a fluid-tight manner, for example through injection molding. The figures relates, in a non-limiting way, to an embodiment wherein the bottom stop 4 is made in a single piece applied on both tapes at one end of the teeth rows, whereas twotop stops 5 are applied therespective tapes 2 at the opposite end of the teeth rows. In other embodiments of the invention, the top stop can be made in a single piece, or the bottom stop can be made in two half-pieces. - Each
tape 2 comprises aknurled surface region 10, formed as a longitudinal stripe extending from saidinner edge 7 and having a predetermined width, so thatteeth 3 are associated with saidknurled region 10 of thetape 2.Knurled region 10 is provided along theentire tape 2 or, at least, on the portion oftape 2 carrying the row ofteeth 3. -
Figs. 2 and 3 show more detail of the embodiment herein discussed.Tapes 2 comprise atextile core 20 fully enveloped by a fluid-barrier coating 21.Teeth 3 have aroot portion 30, coupled to therespective tape 2, and ahead portions 31 projecting frominner edge 7 for reciprocal engagement under the action ofslider 6. It may be noted that edges 7 are formed by thecoating 21 envelopping thetextile core 20. - The
knurled region 10 has a non-smooth surface with a pattern ofcrests 11 projecting away from embossedsurface areas 12, obtained as a permanent deformation of the fluid-barrier coating 21 oftapes 2. Preferably, thecrests 11 are arranged according to the pattern ofFig. 2 , i.e. straight lines crossing at 90° and inclined by 45° with respect to the rows ofteeth 3. - The width W of
knurled region 10 is preferably about 1.5 - 2 times the width ofroot portions 30 of teeth 3 (Fig. 2 ). - As seen in
Fig. 3 , aknurled region 10 is provided on both sides oftapes 2, namely onfront surface 22, intended to face the exterior, and on the opposite rear surface 23. In a garment including the slide fastener 1, for example,front surface 22 is the outer surface exposed to environmental agents, while rear surface 23 is the inner surface. The provision ofknurled regions 10 withcrests 11 and embossedareas 12 on bothsurfaces 22 and 23 of thetapes 2, can be further seen inFigs. 4 and 5 . - In other (not shown) embodiments, a
knurled region 10 can be provided only on one side of thetapes 2, namely on one of said surfaces 22, 23, preferably on thefront surface 22. -
Fig. 6 allows a better appreciation ofcrests 11 projecting away fromareas 12 engraved on the fluid-barrier coating 21 oftapes 2.Fig. 6 also shows a passinghole 13 which is used for molding theteeth 3.Fig. 6 also provides better appreciation of the fact that crests 11 increase the available surface for coupling with theteeth 3, compared to a perfectly smooth tape. In fact, the surface on the plane perpendicular to axis of thehole 13, which would be the only available surface on a smooth tape, is increased by the side surfaces of said crests projecting away fromareas 12. A gain in available surface of 10% or more can be achieved. -
Figs. 7 and 8 show a portion of atape 2 during the manufacturing process. Referring toFig. 7 , astrip 40 is formed by coating a textile, inner core layer with a fluid-barrier layer, enveloping said inner core layer on both sides. Saidstrip 40 has anedge 7, also covered by said fluid-barrier layer, where teeth are associated to the strip. A knurled,longitudinal region 10, in the form of a stripe having a width W, is formed from saidedge 7, by a knurling or embossing process of thestrip 40. Said process defines on surface of the region 10 a pattern ofcrests 11 projecting away fromembossed areas 12, wherein the fluid-barrier layer is made thinner. -
Teeth 3 are then associated to thestrip 40, for example by injection molding, along said edge 7 (Fig. 8 ).Teeth 3 are made integral with the knurled,longitudinal region 10 of thestrip 40.Strip 40 is then cut transversally to obtaintapes 2 of a desired length, and saidtapes 2 are equipped with stops and a slider, such asstops 4, 5 andslider 6, to obtain a fastener zip as seen, for example, inFig. 1 . - Referring to
Fig. 9 , a process for obtaining thestrip 40 is schematized. A textile,continuous strip 50 is passed through asuitable extruder 51, fed with a fluid-barrier material M in a melted state, obtaining as intermediate product acoated strip 52, wherein the textile strip is enveloped by the fluid-barrier material. - Then, the coated strip is passed through a couple of
rolls strip 40 withknurled region 10. Preferably, therolls extruder 51, so that the coating is still hot and easily deformed. It should be noted that thecoated tapes 2 can also be made by lamination. - The
strip 50 can be made of a spun yarn and coated by extrusion or lamination of melted fluid-barrier material, so that the surface irregularities of the spun yarn remain embedded in the solidified fluid-barrier layer and provides a "grasping" effect of the textile layer on the fluid-barrier layer, i.e. a stronger coupling between the layers. - As stated above, there are a number of preferred materials for the
layers tapes 2 and for theteeth 3 in order to obtain a chemical bonding effect which further improves the resistance to delamination. - From the previous description it can clearly be seen that the fluid-tight slide fastener according to the present invention solves the technical problem, mostly by the fact that it exhibits good long-term fluid-tight characteristics and resistance to delamination, bending and other mechanical stress especially at tooth-tape interface.
- Of course, a person skilled in the art can bring numerous modifications and variants to the slide fastener described above in order to satisfy specific and contingent requirements, all of which are in any case covered by the scope of protection of the present invention, as defined by the following claims.
Claims (13)
- A fluid-tight slide fastener (1) comprising a pair of tapes (2), each of said tapes (2) comprising a textile core layer (20) and a fluid barrier layer (21) coating said textile layer, and having at least a portion carrying a row of teeth (3) along an inner edge (7), characterized in that each of said tapes (2) comprises a knurled region (10), said knurled region (10) being located on at least one side of the tape (2) and on the exterior side of the fluid-barrier layer, said knurled region (10) being extended along said inner edge (7) of tape (2) as a continuous longitudinal stripe parallel to said inner edge (7), and being extended at least on said portion of the tape (2) that is carrying said row of teeth (3) such that the teeth are fixed to the knurled region of the tape.
- A slide fastener according to claim 1, wherein said knurled region (10) has a width (W) which is greater than width of root portions (30) of said teeth (3) fixed to the tape (2).
- A slide fastener according to claim 2, wherein said knurled region has a width (W), in a direction perpendicular to said inner edge (7), which is about 1.5 - 2 times the width of said root portions (30) of teeth (3).
- A slide fastener according to any one of preceding claims, wherein said knurled region (10) has a pattern of crests (11) projecting from embossed areas (12) of the tape (2).
- A slide fastener according to claim 4, wherein said crests (11) are crossing at 90° each other and inclined by 45° with respect to the longitudinal direction of the tape (2).
- A slide fastener according to any one of preceding claims, wherein said knurled region (10) is provided on both front and rear surfaces (22, 23) of tapes (2).
- A slide fastener according to any one of preceding claims, wherein said textile core (20) of the tapes (2) is made with a spun yarn.
- A slide fastener according to any one of preceding claims, wherein said fluid barrier layer is made of TPE-E and teeth are made of PBT.
- A slide fastener according to claim 8, wherein said fluid barrier layer is made of TPE-U and teeth are made of either a blend of ABS and PA or a blend of PBT and PC.
- A process for making a tape (2) for a slide fastener (1) according to claim 1, comprising at least the steps of:- coating a textile strip with a fluid-barrier material;- subjecting the coated strip to a knurling process, to obtain a knurled or embossed region (10) on at least one side of said strip and on the exterior side of the fluid barrier layer and near an edge (7) thereof;- said knurled region (10) being extended along said edge (7) of the tape (2) as a continuous longitudinal stripe parallel to said edge (7),- fixing a row of teeth to said embossed region of the strip;- cutting the strip to obtain a tape of a given length.
- A process according to claim 10, wherein said textile strip is made of a spun yarn of cut fibers, said fibers being obtained with a cutting process of continuous fibers.
- A process according to claim 11, wherein said strip of textile material is coated by extrusion or lamination of said fluid-barrier material, said fluid-barrier material being in a melted state, so that surface irregularities of said spun yarn remain embedded in the fluid-barrier layer.
- A sports and outdoor activity item, such as diving suit, sailing suit, camping tent and the like, comprising a fluid-tight slide fastener according to any one of claims 1 to 9.
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE602007010965T DE602007010965D1 (en) | 2007-12-20 | 2007-12-20 | Liquid-tight zipper |
SI200730502T SI2071972T1 (en) | 2007-12-20 | 2007-12-20 | A fluid-tight slide fastener |
AT07024770T ATE489865T1 (en) | 2007-12-20 | 2007-12-20 | LIQUID-PROOF ZIPPER |
DK07024770.5T DK2071972T3 (en) | 2007-12-20 | 2007-12-20 | Fluid proof zip |
PT07024770T PT2071972E (en) | 2007-12-20 | 2007-12-20 | A fluid-tight slide fastener |
EP07024770A EP2071972B1 (en) | 2007-12-20 | 2007-12-20 | A fluid-tight slide fastener |
ES07024770T ES2357134T3 (en) | 2007-12-20 | 2007-12-20 | SLIDING CLOSURE CLOSED TO THE FLUIDS. |
PL07024770T PL2071972T3 (en) | 2007-12-20 | 2007-12-20 | A fluid-tight slide fastener |
CY20111100196T CY1111207T1 (en) | 2007-12-20 | 2011-02-16 | AN AIR-ROOF ZERO |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07024770A EP2071972B1 (en) | 2007-12-20 | 2007-12-20 | A fluid-tight slide fastener |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2071972A1 EP2071972A1 (en) | 2009-06-24 |
EP2071972B1 true EP2071972B1 (en) | 2010-12-01 |
Family
ID=39333047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP07024770A Not-in-force EP2071972B1 (en) | 2007-12-20 | 2007-12-20 | A fluid-tight slide fastener |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP2071972B1 (en) |
AT (1) | ATE489865T1 (en) |
CY (1) | CY1111207T1 (en) |
DE (1) | DE602007010965D1 (en) |
DK (1) | DK2071972T3 (en) |
ES (1) | ES2357134T3 (en) |
PL (1) | PL2071972T3 (en) |
PT (1) | PT2071972E (en) |
SI (1) | SI2071972T1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0912179D0 (en) * | 2009-07-13 | 2009-08-26 | Ykk Europ Ltd | Watertight zip fastener |
KR101325441B1 (en) | 2009-11-30 | 2013-11-04 | 와이케이케이 가부시끼가이샤 | Liquid-tight slide fastener and manufacturing method therefor |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT326067B (en) * | 1971-06-17 | 1975-11-25 | Yoshida Kogyo Kk | ZIPPER |
US4426066A (en) * | 1976-04-05 | 1984-01-17 | Talon, Inc. | Method of making slide fastener |
JPS5812866Y2 (en) * | 1976-09-02 | 1983-03-11 | ワイケイケイ株式会社 | Slide fastener |
AU541561B2 (en) * | 1982-09-09 | 1985-01-10 | Yoshida Kogyo K.K. | Watertight slide fastener stringer |
DK1294248T3 (en) * | 2000-07-11 | 2007-06-11 | Crelux Holding Sa | Sealing zipper with teeth welded the ties as they join |
GB0102142D0 (en) * | 2001-01-27 | 2001-03-14 | Ardmel Automation Ltd | Slide fastener |
US20060101632A1 (en) * | 2004-11-12 | 2006-05-18 | Shih Sheng Yang | Method for infiltrating water-proof material into zipper |
-
2007
- 2007-12-20 EP EP07024770A patent/EP2071972B1/en not_active Not-in-force
- 2007-12-20 ES ES07024770T patent/ES2357134T3/en active Active
- 2007-12-20 AT AT07024770T patent/ATE489865T1/en active
- 2007-12-20 DE DE602007010965T patent/DE602007010965D1/en active Active
- 2007-12-20 PT PT07024770T patent/PT2071972E/en unknown
- 2007-12-20 PL PL07024770T patent/PL2071972T3/en unknown
- 2007-12-20 DK DK07024770.5T patent/DK2071972T3/en active
- 2007-12-20 SI SI200730502T patent/SI2071972T1/en unknown
-
2011
- 2011-02-16 CY CY20111100196T patent/CY1111207T1/en unknown
Also Published As
Publication number | Publication date |
---|---|
ES2357134T3 (en) | 2011-04-19 |
DK2071972T3 (en) | 2011-02-07 |
PT2071972E (en) | 2011-01-05 |
EP2071972A1 (en) | 2009-06-24 |
ATE489865T1 (en) | 2010-12-15 |
CY1111207T1 (en) | 2015-06-11 |
DE602007010965D1 (en) | 2011-01-13 |
SI2071972T1 (en) | 2011-03-31 |
PL2071972T3 (en) | 2011-04-29 |
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